\u306f\u3058\u3081\u307e\u3057\u3066\u3001\u80e1\u3068\u7533\u3057\u307e\u3059\u3002
\n\u666e\u6bb5\u306f\u8a00\u8a9e\u51e6\u7406\u306e\u7814\u7a76\u958b\u767a\u306b\u643a\u308f\u3063\u3066\u304a\u308a\u3001Python\u3067\u5b9f\u9a13\u74b0\u5883\u3092\u4f5c\u3063\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002
\n\u4eca\u56de\u306f\u3001\u79c1\u304c\u5b9f\u969b\u306b\u5b9f\u9a13\u3067\u3088\u304f\u4f7f\u3046List\u578b\u306b\u95a2\u3059\u308b\u64cd\u4f5c\u30e1\u30e2\u3092\u30b7\u30a7\u30a2\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
\u300c\u30e4\u30d0\u30a4\u3001backup\u7528\u306eList\u3082\u4e0a\u66f8\u304d\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\uff01\u300d\u3068\u3001
\n\u81ea\u5206\u306e\u7518\u3055\u306b\u5f8c\u6094\u3057\u305f\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
>>> foo = ['a', 'b', 'c']\r\n>>> foo_back = foo<\/pre>\n\u3053\u306e\u524d\u63d0\u3067\u3001foo[0]\u306b'd'\u3092\u4e0e\u3048\u308b\u3068\u3001foo_back\u3082['d', 'b', 'c']\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3088\u306d\u3002
\n\u3053\u308c\u306f\u3001Python\u3067\u306f\u3001\u3042\u308b\u5909\u6570\u306bList\u578b\u306e\u5909\u6570\u3092assignment\uff08foo_back = foo\uff09\u3059\u308b\u3068\u3044\u3046\u306e\u306f\u3001
\n\u5358\u306b\u201c=\u201d\u30aa\u30da\u30ec\u30fc\u30bf\u524d\u306e\u5909\u6570\uff08foo_back\uff09\u306b
\n\u300c\u305d\u306e\u5f8c\u308d\u306e\u5909\u6570\uff08foo\uff09\u304c\u53c2\u7167\u3057\u3066\u3044\u308blist\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u300d
\n\u3068\u6559\u3048\u305f\u3060\u3051\u3060\u304b\u3089\u3067\u3059\u3002
\n\u3064\u307e\u308a\u3001\u4e0a\u8ff0\u306e\u4f8b\u3067\u306f\u3001foo_back = foo\u306b\u3088\u308bList\u4e2d\u8eab\u306e\u30b3\u30d4\u30fc\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\u3053\u308c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u306f\u3001<\/p>\n
>>> import copy\r\n>>> foo_back = copy.copy(foo)<\/pre>\n\u3092\u4f7f\u3044\u307e\u3059\u3002
\n\u307e\u305f\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u306b\u3088\u308bList\u578b\u30c7\u30fc\u30bf\u306e\u30b3\u30d4\u30fc\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n>>> foo_back = foo[:]<\/pre>\nShallow copies of dictionaries can be made using dict.copy(), and of lists by assigning a slice of the entire list, for example, copied_list = original_list[:].<\/p><\/blockquote>\n
--Python 2.7.9 documentation: copy<\/a><\/p>\n
\u3053\u3053\u3067\u201cfoo[:]\u201d\u3068\u3044\u3046\u306e\u306f\u3001\u5143\u3005\u306ffoo[n:m]\u3067\u3042\u308a\u3001
\nfoo\u306e n \u304b\u3089 m-1 \u307e\u3067\u306e\u8981\u7d20\u3092\u30b9\u30e9\u30a4\u30b9\u3059\u308b\u3068\u3044\u3046\u610f\u5473\u306b\u306a\u308a\u307e\u3059\u3002
\n\u5168List\u306e\u30b3\u30d4\u30fc\u3067\u3042\u308b\u305f\u3081\u3001 n \u3068 m \u306f\u305d\u308c\u305e\u308c 0 \u3068 len(foo)\u3000\u306b\u306a\u308a\u3001
\n\u7701\u7565\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\u3053\u306e\u3088\u3046\u306b\u3001List\u3092\u30b3\u30d4\u30fc\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001
\nfoo\u3092\u3069\u306e\u3088\u3046\u306b\u5909\u66f4\u3057\u3066\u3082\u3001foo_back\u3078\u306e\u5f71\u97ff\u306f\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\u305f\u3060\u3057\u3001\u4e0a\u8ff0\u306e\u65b9\u6cd5\u306f\u3044\u305a\u308c\u3082\u6d45\u3044\u30b3\u30d4\u30fc\uff08shallow copy\uff09\u3067\u3042\u308a\u3001
\n[['a', 'b'], 'c', 'd'] \u306e\u3088\u3046\u306a\u3001nested list\u306b\u306a\u3063\u305f\u30c7\u30fc\u30bf\u306e\u30b3\u30d4\u30fc\u306b\u306f\u5bfe\u5fdc\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n>>> foo = [['a', 'b'], 'c', 'd']\r\n>>> foo_back = foo[:]\r\n>>> foo[0][1] = 1\r\n>>> print foo_back\r\n[['a', 1], 'c', 'd']<\/pre>\n\u3053\u306e\u5834\u5408\u306f\u3001\u6df1\u3044\u30b3\u30d4\u30fc\uff08deep copy\uff09\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n
>>> foo = [['a', 'b'], 'c', 'd']\r\n>>> import copy\r\n>>> foo_back = copy.deepcopy(foo)\r\n>>> foo[0][1] = 1\r\n>>> print foo_back\r\n[['a', 'b'], 'c', 'd']<\/pre>\n\u53c2\u8003\uff1aPython 2.7.9 documentation: copy<\/a><\/p>\n
\u307b\u304b\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u8a00\u8a9e\u3068\u6bd4\u8f03\u3059\u308b\u305f\u3081\u306b\u3001JavaScript\u3068Ruby\u306eList\u30b3\u30d4\u30fc\u6cd5\u306b\u3064\u3044\u3066\u3082\u307e\u3068\u3081\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n
Python\u3001JavaScript\u3068Ruby\u306eList\u30b3\u30d4\u30fc\u6cd5<\/b><\/font><\/p>\n